TWI502461B - Driving method of a touch system - Google Patents
Driving method of a touch system Download PDFInfo
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- TWI502461B TWI502461B TW102131864A TW102131864A TWI502461B TW I502461 B TWI502461 B TW I502461B TW 102131864 A TW102131864 A TW 102131864A TW 102131864 A TW102131864 A TW 102131864A TW I502461 B TWI502461 B TW I502461B
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- G—PHYSICS
- G06—COMPUTING; CALCULATING OR COUNTING
- G06F—ELECTRIC DIGITAL DATA PROCESSING
- G06F3/00—Input arrangements for transferring data to be processed into a form capable of being handled by the computer; Output arrangements for transferring data from processing unit to output unit, e.g. interface arrangements
- G06F3/01—Input arrangements or combined input and output arrangements for interaction between user and computer
- G06F3/03—Arrangements for converting the position or the displacement of a member into a coded form
- G06F3/041—Digitisers, e.g. for touch screens or touch pads, characterised by the transducing means
- G06F3/044—Digitisers, e.g. for touch screens or touch pads, characterised by the transducing means by capacitive means
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- G—PHYSICS
- G06—COMPUTING; CALCULATING OR COUNTING
- G06F—ELECTRIC DIGITAL DATA PROCESSING
- G06F3/00—Input arrangements for transferring data to be processed into a form capable of being handled by the computer; Output arrangements for transferring data from processing unit to output unit, e.g. interface arrangements
- G06F3/01—Input arrangements or combined input and output arrangements for interaction between user and computer
- G06F3/03—Arrangements for converting the position or the displacement of a member into a coded form
- G06F3/041—Digitisers, e.g. for touch screens or touch pads, characterised by the transducing means
- G06F3/0412—Digitisers structurally integrated in a display
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- G—PHYSICS
- G06—COMPUTING; CALCULATING OR COUNTING
- G06F—ELECTRIC DIGITAL DATA PROCESSING
- G06F3/00—Input arrangements for transferring data to be processed into a form capable of being handled by the computer; Output arrangements for transferring data from processing unit to output unit, e.g. interface arrangements
- G06F3/01—Input arrangements or combined input and output arrangements for interaction between user and computer
- G06F3/03—Arrangements for converting the position or the displacement of a member into a coded form
- G06F3/041—Digitisers, e.g. for touch screens or touch pads, characterised by the transducing means
- G06F3/0416—Control or interface arrangements specially adapted for digitisers
- G06F3/0418—Control or interface arrangements specially adapted for digitisers for error correction or compensation, e.g. based on parallax, calibration or alignment
- G06F3/04184—Synchronisation with the driving of the display or the backlighting unit to avoid interferences generated internally
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- G—PHYSICS
- G09—EDUCATION; CRYPTOGRAPHY; DISPLAY; ADVERTISING; SEALS
- G09G—ARRANGEMENTS OR CIRCUITS FOR CONTROL OF INDICATING DEVICES USING STATIC MEANS TO PRESENT VARIABLE INFORMATION
- G09G3/00—Control arrangements or circuits, of interest only in connection with visual indicators other than cathode-ray tubes
- G09G3/20—Control arrangements or circuits, of interest only in connection with visual indicators other than cathode-ray tubes for presentation of an assembly of a number of characters, e.g. a page, by composing the assembly by combination of individual elements arranged in a matrix no fixed position being assigned to or needed to be assigned to the individual characters or partial characters
- G09G3/34—Control arrangements or circuits, of interest only in connection with visual indicators other than cathode-ray tubes for presentation of an assembly of a number of characters, e.g. a page, by composing the assembly by combination of individual elements arranged in a matrix no fixed position being assigned to or needed to be assigned to the individual characters or partial characters by control of light from an independent source
- G09G3/36—Control arrangements or circuits, of interest only in connection with visual indicators other than cathode-ray tubes for presentation of an assembly of a number of characters, e.g. a page, by composing the assembly by combination of individual elements arranged in a matrix no fixed position being assigned to or needed to be assigned to the individual characters or partial characters by control of light from an independent source using liquid crystals
- G09G3/3611—Control of matrices with row and column drivers
- G09G3/3648—Control of matrices with row and column drivers using an active matrix
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- G—PHYSICS
- G09—EDUCATION; CRYPTOGRAPHY; DISPLAY; ADVERTISING; SEALS
- G09G—ARRANGEMENTS OR CIRCUITS FOR CONTROL OF INDICATING DEVICES USING STATIC MEANS TO PRESENT VARIABLE INFORMATION
- G09G3/00—Control arrangements or circuits, of interest only in connection with visual indicators other than cathode-ray tubes
- G09G3/20—Control arrangements or circuits, of interest only in connection with visual indicators other than cathode-ray tubes for presentation of an assembly of a number of characters, e.g. a page, by composing the assembly by combination of individual elements arranged in a matrix no fixed position being assigned to or needed to be assigned to the individual characters or partial characters
- G09G3/34—Control arrangements or circuits, of interest only in connection with visual indicators other than cathode-ray tubes for presentation of an assembly of a number of characters, e.g. a page, by composing the assembly by combination of individual elements arranged in a matrix no fixed position being assigned to or needed to be assigned to the individual characters or partial characters by control of light from an independent source
- G09G3/36—Control arrangements or circuits, of interest only in connection with visual indicators other than cathode-ray tubes for presentation of an assembly of a number of characters, e.g. a page, by composing the assembly by combination of individual elements arranged in a matrix no fixed position being assigned to or needed to be assigned to the individual characters or partial characters by control of light from an independent source using liquid crystals
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- Engineering & Computer Science (AREA)
- Theoretical Computer Science (AREA)
- General Engineering & Computer Science (AREA)
- Physics & Mathematics (AREA)
- General Physics & Mathematics (AREA)
- Human Computer Interaction (AREA)
- Chemical & Material Sciences (AREA)
- Crystallography & Structural Chemistry (AREA)
- Computer Hardware Design (AREA)
- Position Input By Displaying (AREA)
- Control Of Indicators Other Than Cathode Ray Tubes (AREA)
- Liquid Crystal Display Device Control (AREA)
Description
本發明是有關於一種觸控系統的驅動方法，尤指一種可動態更新面板雜訊基準值以降低液晶面板的干擾並增加觸控感測電路所產生的觸控資料的準確性的觸控系統的驅動方法。The present invention relates to a driving method for a touch system, and more particularly to a touch system capable of dynamically updating a panel noise reference value to reduce interference of a liquid crystal panel and increasing the accuracy of touch data generated by the touch sensing circuit. Drive method.
電容式觸控面板常因外在環境或液晶面板的特性產生雜訊。例如當液晶面板的液晶轉動時，液晶面板的電容值將隨液晶的轉動而變化，而液晶面板的電容值的變化將會對電容式觸控面板的觸控訊號產生影響。當處理器偵測觸控訊號時，處理器是利用一臨界值判斷觸控訊號是否為雜訊，亦即當觸控訊號大於臨界值時，處理器會判斷觸控訊號為真實的觸控訊號。然而有時候處理器的判斷結果會因為電容式觸控面板所產生的雜訊太大而錯誤。Capacitive touch panels often generate noise due to the external environment or the characteristics of the liquid crystal panel. For example, when the liquid crystal of the liquid crystal panel rotates, the capacitance value of the liquid crystal panel changes with the rotation of the liquid crystal, and the change of the capacitance value of the liquid crystal panel will affect the touch signal of the capacitive touch panel. When the processor detects the touch signal, the processor determines whether the touch signal is noise by using a threshold value, that is, when the touch signal is greater than the threshold, the processor determines that the touch signal is a true touch signal. . However, sometimes the judgment of the processor may be wrong because the noise generated by the capacitive touch panel is too large.
如果處理器是利用訊號處理技術來濾除電容式觸控面板所產生的雜訊時，雖然可增加處理器的判斷結果的準確度，但亦會增加處理器的複雜度。另外，如果處理器是利用液晶面板的空白區間(例如液晶面板的H-sync blanking或V-sync blanking)執行觸控偵測時，雖然不會增加處理器的複雜度，但是觸控訊號的報點率(report rate)將會限制在60Hz。If the processor uses the signal processing technology to filter out the noise generated by the capacitive touch panel, although the accuracy of the judgment result of the processor can be increased, the complexity of the processor is also increased. In addition, if the processor performs touch detection by using a blank area of the liquid crystal panel (for example, H-sync blanking or V-sync blanking of the liquid crystal panel), although the complexity of the processor is not increased, the touch signal is reported. The rate of return will be limited to 60 Hz.
因此，上述現有技術對於電容式觸控面板的設計者而言都不是一個好的選擇。Therefore, the above prior art is not a good choice for designers of capacitive touch panels.
本發明的一實施例提供一種觸控系統的驅動方法，該觸控系統包含一時序控制器、一觸控面板、一液晶面板、一液晶面板驅動電路及一觸控感測電路，其中該液晶面板分成複數個區塊。該方法包含該時序控制器產生一第一控制訊號、一第二控制訊號與一第三控制訊號；該液晶面板驅動電路在一畫面時間中根據該第一控制訊號，依序驅動該複數個區塊中的每一區塊顯示一影像；該觸控感測電路於該區塊顯示該影像時同步根據該第二控制訊號，擷取該觸控面板中非對應該區塊的一觸控區塊的目前面板雜訊基準值；該觸控感測電路根據該目前面板雜訊基準值，更新該觸控區塊在前一畫面時間中的前面板雜訊基準值；該觸控感測電路根據該第三控制訊號，對該觸控區塊執行一觸控偵測以產生一相對應的觸控原始資料；該觸控感測電路根據該觸控原始資料和該目前面板雜訊基準值，產生對應該觸控區塊的觸控資料。An embodiment of the present invention provides a driving method for a touch system, the touch system includes a timing controller, a touch panel, a liquid crystal panel, a liquid crystal panel driving circuit, and a touch sensing circuit, wherein the liquid crystal The panel is divided into a plurality of blocks. The method includes: the timing controller generates a first control signal, a second control signal, and a third control signal; the liquid crystal panel driving circuit sequentially drives the plurality of regions according to the first control signal in a picture time Each block in the block displays an image; the touch sensing circuit synchronously captures a touch area of the non-corresponding block in the touch panel according to the second control signal when the image is displayed in the block The current panel noise reference value of the block; the touch sensing circuit updates the front panel noise reference value of the touch block in the previous picture time according to the current panel noise reference value; the touch sensing circuit Performing a touch detection on the touch block to generate a corresponding touch original data according to the third control signal; the touch sensing circuit is configured according to the touch original data and the current panel noise reference value , generating touch data corresponding to the touch block.
本發明的另一實施例提供一種觸控系統的驅動方法，該觸控系統包含一時序控制器、一觸控面板、一液晶面板、一液晶面板驅動電路及一觸控感測電路，其中該液晶面板分成複數個區塊。該方法包含該時序控制器產生一第一控制訊號、一第二控制訊號與一第三控制訊號；該液晶面板驅動電路在一畫面時間中根據該第一控制訊號，依序驅動該複數個區塊中的每一區塊以顯示一影像；該觸控感測電路於該畫面時間中的一垂直空白區間，根據該第二控制訊號，擷取對應該觸控面板的目前面板雜訊基準值；該觸控感測電路根據該面板雜訊基準值，更新該觸控面板在前一畫面時間中的前面板雜訊基準值；該觸控感測電路根據該第三控制訊號，對該觸控面板中的一觸控區塊執行一觸控偵測以產生一相對應的觸控原始資料；該觸控感測電路根據該觸控原始資料和該目前面板雜訊基準值，產生對應該觸控區塊的觸控資料。Another embodiment of the present invention provides a driving method of a touch system, the touch system includes a timing controller, a touch panel, a liquid crystal panel, a liquid crystal panel driving circuit, and a touch sensing circuit. The liquid crystal panel is divided into a plurality of blocks. The method includes: the timing controller generates a first control signal, a second control signal, and a third control signal; the liquid crystal panel driving circuit sequentially drives the plurality of regions according to the first control signal in a picture time Each block in the block displays an image; the touch sensing circuit captures a current panel noise reference value corresponding to the touch panel according to the second control signal in a vertical blank interval of the screen time. The touch sensing circuit updates the front panel noise reference value of the touch panel in the previous screen time according to the panel noise reference value; the touch sensing circuit receives the touch according to the third control signal A touch block in the control panel performs a touch detection to generate a corresponding touch original data; the touch sensing circuit generates a corresponding image according to the touch original data and the current panel noise reference value. Touch data of the touch block.
本發明提供一種觸控系統的驅動方法。該驅動方法是利用一觸控感測電路擷取對應一觸控面板中一觸控區塊的目前面板雜訊基準值，或利用 該觸控感測電路擷取對應該觸控面板的目前面板雜訊基準值。當該觸控感測電路擷取對應該觸控面板中該觸控區塊的目前面板雜訊基準值時，該觸控感測電路根據對應該觸控區塊的觸控原始資料和對應該觸控區塊的目前面板雜訊基準值，產生對應該觸控區塊的觸控資料；當該觸控感測電路擷取對應該觸控面板的目前面板雜訊基準值時，該觸控感測電路根據對應該觸控區塊的觸控原始資料和對應該觸控面板的目前面板雜訊基準值，產生對應該觸控區塊的觸控資料。相較於現有技術，因為本發明可動態更新對應該觸控區塊的目前面板雜訊基準值或對應該觸控面板的目前面板雜訊基準值，所以本發明可降低一液晶面板的干擾以增加該觸控感測電路所產生的觸控資料的準確性，亦不會限制一觸控訊號的報點率。The invention provides a driving method of a touch system. The driving method uses a touch sensing circuit to capture a current panel noise reference value corresponding to a touch block in a touch panel, or utilizes The touch sensing circuit captures a current panel noise reference value corresponding to the touch panel. When the touch sensing circuit captures the current panel noise reference value corresponding to the touch block in the touch panel, the touch sensing circuit responds to the touch original data corresponding to the touch block and corresponds to The current panel noise reference value of the touch block generates touch data corresponding to the touch block; when the touch sensing circuit captures the current panel noise reference value corresponding to the touch panel, the touch The sensing circuit generates touch data corresponding to the touch block according to the touch original data corresponding to the touch block and the current panel noise reference value corresponding to the touch panel. Compared with the prior art, since the present invention can dynamically update the current panel noise reference value corresponding to the touch block or the current panel noise reference value corresponding to the touch panel, the present invention can reduce the interference of a liquid crystal panel. Increasing the accuracy of the touch data generated by the touch sensing circuit does not limit the reporting rate of a touch signal.
100‧‧‧觸控系統100‧‧‧ touch system
102‧‧‧時序控制器102‧‧‧ timing controller
104‧‧‧觸控面板104‧‧‧Touch panel
106‧‧‧液晶面板106‧‧‧LCD panel
108‧‧‧液晶面板驅動電路108‧‧‧LCD panel driver circuit
110‧‧‧觸控感測電路110‧‧‧Touch sensing circuit
112‧‧‧暫存區112‧‧‧Scratch area
1061-106N‧‧‧區塊1061-106N‧‧‧ Block
FCS‧‧‧第一控制訊號FCS‧‧‧First control signal
FP‧‧‧畫面時間FP‧‧‧ screen time
PNBL‧‧‧目前面板雜訊基準值PNBL‧‧‧ current panel noise reference value
PPNBL‧‧‧前面板雜訊基準值PPNBL‧‧‧ front panel noise reference value
SCS‧‧‧第二控制訊號SCS‧‧‧second control signal
TCS‧‧‧第三控制訊號TCS‧‧‧ third control signal
THV‧‧‧臨界值THV‧‧‧ threshold
TS‧‧‧觸控訊號TS‧‧‧ touch signal
VSYNC1、VSYNC2‧‧‧垂直同步訊號VSYNC1, VSYNC2‧‧‧ vertical sync signal
VB‧‧‧垂直空白區間VB‧‧‧ vertical blank interval
400-412、700-712‧‧‧步驟400-412, 700-712‧‧ steps
第1圖是說明觸控系統的示意圖。Figure 1 is a schematic diagram illustrating a touch system.
第2圖是說明觸控面板和液晶面板的位置關係的示意圖。Fig. 2 is a schematic view showing the positional relationship between the touch panel and the liquid crystal panel.
第3圖是說明液晶面板具有複數個區塊的示意圖。Fig. 3 is a schematic view showing that the liquid crystal panel has a plurality of blocks.
第4圖是本發明的一實施例說明一種觸控系統的驅動方法的流程圖。FIG. 4 is a flow chart showing a driving method of a touch system according to an embodiment of the present invention.
第5圖是說明液晶面板的複數個區塊的顯示時序與觸控感測電路擷取觸控面板的目前面板雜訊基準值的時序的示意圖。FIG. 5 is a schematic diagram illustrating timings of display timing of a plurality of blocks of the liquid crystal panel and timings of current panel noise reference values of the touch sensing circuit captured by the touch sensing circuit.
第6圖是說明目前面板雜訊基準值、前面板雜訊基準值、臨界值和觸控訊號的關係示意圖。Figure 6 is a schematic diagram showing the relationship between the current panel noise reference value, the front panel noise reference value, the threshold value, and the touch signal.
第7圖是本發明的另一實施例說明一種觸控系統的驅動方法的流程圖。FIG. 7 is a flow chart showing a driving method of a touch system according to another embodiment of the present invention.
第8圖是說明液晶面板的複數個區塊的顯示時序與觸控感測電路擷取觸控面板的目前面板雜訊基準值的時序的示意圖。FIG. 8 is a schematic diagram showing the timing of displaying the plurality of blocks of the liquid crystal panel and the timing of the current panel noise reference value of the touch panel by the touch sensing circuit.
請參照第1圖，第1圖是說明觸控系統100的示意圖。如第1圖 所示，觸控系統100包含一時序控制器102、一觸控面板104、一液晶面板106(未繪示於第1圖)、一液晶面板驅動電路108及一觸控感測電路110，其中觸控面板104位於液晶面板106之上(如第2圖所示)，液晶面板106具有複數個區塊1061-106N(如第3圖所示)，且N是正整數。一般說來，液晶面板106的像素列的數目會大於觸控面板104的觸控單元列的數目。因此，液晶面板106中多條像素列的寬度會等於觸控面板104中一條觸控單元列的寬度，且液晶面板106的複數個區塊1061-106N的數目和觸控面板104的觸控感測單元列的數目相同。例如：如第3圖所示，如果液晶面板106的解析度為540*960，且60條像素列的寬度等於一條觸控單元列的寬度，則觸控面板104會有16條觸控單元列，且因為觸控面板104具有16條觸控單元列，所以液晶面板106會具有16個區塊。但本發明並不受限於60條像素列的寬度等於一條觸控單元列的寬度。另外，觸控面板104是一互感式電容觸控面板。但在本發明的另一實施例中，觸控面板104是一自感式電容觸控面板。Please refer to FIG. 1 , which is a schematic diagram illustrating the touch system 100 . As shown in Figure 1 The touch control system 100 includes a timing controller 102, a touch panel 104, a liquid crystal panel 106 (not shown in FIG. 1), a liquid crystal panel driving circuit 108, and a touch sensing circuit 110. The touch panel 104 is located above the liquid crystal panel 106 (as shown in FIG. 2), and the liquid crystal panel 106 has a plurality of blocks 1061-106N (as shown in FIG. 3), and N is a positive integer. In general, the number of pixel columns of the liquid crystal panel 106 may be greater than the number of touch cell columns of the touch panel 104. Therefore, the width of the plurality of pixel columns in the liquid crystal panel 106 is equal to the width of one touch cell row in the touch panel 104, and the number of the plurality of blocks 1061-106N of the liquid crystal panel 106 and the touch sense of the touch panel 104 The number of measurement unit columns is the same. For example, as shown in FIG. 3, if the resolution of the liquid crystal panel 106 is 540*960, and the width of the 60 pixel columns is equal to the width of one touch cell row, the touch panel 104 has 16 touch cell columns. And because the touch panel 104 has 16 touch cell columns, the liquid crystal panel 106 has 16 blocks. However, the present invention is not limited to the width of 60 pixel columns being equal to the width of one touch cell column. In addition, the touch panel 104 is a mutual inductance capacitive touch panel. However, in another embodiment of the present invention, the touch panel 104 is a self-inductive capacitive touch panel.
請參照第4圖和第5圖，第4圖是本發明的一實施例說明一種觸控系統的驅動方法的流程圖，和第5圖是說明液晶面板106的複數個區塊1061-106N的顯示時序與觸控感測電路110擷取觸控面板104的目前面板雜訊基準值的時序的示意圖。第4圖的驅動方法是利用第1圖的觸控系統100說明，詳細步驟如下： 步驟400：開始；步驟402：時序控制器102產生一第一控制訊號FCS、一第二控制訊號SCS與一第三控制訊號TCS；步驟404：液晶面板驅動電路108在一畫面時間FP中根據第一控制訊號FCS，依序驅動液晶面板106的複數個區塊1061-106N中的每一區塊顯示一影像； 步驟406：觸控感測電路110於複數個區塊1061-106N中的該區塊顯示影像時同步根據第二控制訊號SCS，擷取觸控面板104中非對應該區塊的一觸控區塊的目前面板雜訊基準值PNBL；步驟408：觸控感測電路110根據觸控面板104的觸控區塊的目前面板雜訊基準值PNBL，更新觸控面板104的觸控區塊在前一畫面時間中的前面板雜訊基準值PPNBL；步驟410：觸控感測電路110根據第三控制訊號TCS，對觸控面板104的觸控區塊執行一觸控偵測以產生一相對應的觸控原始資料；步驟412：觸控感測電路110根據觸控面板104的觸控區塊的觸控原始資料和目前面板雜訊基準值，產生對應觸控面板104的觸控區塊的觸控資料，跳回步驟402。Referring to FIG. 4 and FIG. 5, FIG. 4 is a flowchart illustrating a driving method of the touch system according to an embodiment of the present invention, and FIG. 5 is a diagram illustrating a plurality of blocks 1061-106N of the liquid crystal panel 106. The timing of the display timing and touch sensing circuit 110 captures the timing of the current panel noise reference value of the touch panel 104. The driving method of FIG. 4 is explained by using the touch system 100 of FIG. 1, and the detailed steps are as follows: Step 400: Start; Step 402: The timing controller 102 generates a first control signal FCS, a second control signal SCS and a third control signal TCS; Step 404: The LCD panel driving circuit 108 is in a picture time FP according to the first a control signal FCS sequentially driving each of the plurality of blocks 1061-106N of the liquid crystal panel 106 to display an image; Step 406: The touch sensing circuit 110 synchronizes the touch area of the non-corresponding block in the touch panel 104 according to the second control signal SCS when the image is displayed in the plurality of blocks 1061-106N. The current panel noise reference value PNBL of the block is obtained. Step 408: The touch sensing circuit 110 updates the touch block of the touch panel 104 according to the current panel noise reference value PNBL of the touch panel of the touch panel 104. The front panel noise reference value PPNBL in one screen time; the step 410: the touch sensing circuit 110 performs a touch detection on the touch panel of the touch panel 104 according to the third control signal TCS to generate a corresponding The touch sensing circuit 110 generates the touch block corresponding to the touch panel 104 according to the touch original data of the touch panel of the touch panel 104 and the current panel noise reference value. Touch the data and jump back to step 402.
在步驟404中，液晶面板驅動電路108在畫面時間FP中根據第一控制訊號FCS，由上而下依序驅動液晶面板106的複數個區塊1061-106N中的每一區塊顯示一影像，其中畫面時間FP是介於液晶面板106的二連續垂直同步訊號VSYNC1、VSYNC2之間。因此，如第5圖所示，液晶面板驅動電路108正在根據第一控制訊號FCS，驅動區塊1067顯示一影像。亦即液晶面板驅動電路108已經根據第一控制訊號FCS，驅動區塊1061-1066顯示相對應的影像。在步驟406中，觸控感測電路110是根據第二控制訊號SCS，依序擷取觸控面板104每一區塊的目前面板雜訊基準值，其中觸控感測電路110不會根據第二控制訊號SCS，擷取觸控面板104中對應區塊1067的一區塊的目前面板雜訊基準值。因此，當區塊1067顯示影像時，觸控感測電路110可根據第二控制訊號SCS，同步擷取觸控面板104中非對應區塊1067的一觸控區塊的目前面板雜訊基準值PNBL(如第6圖所示)，其中觸控面板104的觸控區塊是對應區塊1061-1066中的一區塊或對應區塊1068-106N中的一區塊。因為觸控感測電路110是根據第二控制訊號SCS，同步擷取觸控面板 104中非對應區塊1067的觸控區塊的目前面板雜訊基準值PNBL，所以液晶面板106的複數個區塊1061-106N的顯示速率和觸控感測電路110擷取觸控面板104的複數個觸控區塊的目前面板雜訊基準值的速率相同。另外，如果當觸控感測電路110於區塊1067顯示影像時根據第二控制訊號SCS，預備擷取觸控面板104的觸控區塊的目前面板雜訊基準值PNBL，以及根據第三控制訊號TCS，預備對觸控面板104的觸控區塊執行觸控偵測時，觸控感測電路110先根據第三控制訊號TCS，對觸控面板104的觸控區塊執行觸控偵測，然後再根據第二控制訊號SCS，擷取觸控面板104的觸控區塊的目前面板雜訊基準值PNBL。在步驟408中，觸控感測電路110根據觸控面板104的觸控區塊的目前面板雜訊基準值PNBL，更新觸控面板104的觸控區塊在前一畫面時間中的前面板雜訊基準值PPNBL，其中觸控面板104的觸控區塊在前一畫面時間中的前面板雜訊基準值PPNBL是儲存在觸控系統100內的一暫存區112，且觸控面板104的觸控區塊的目前面板雜訊基準值PNBL是位於觸控區塊在前一畫面時間中的前面板雜訊基準值PPNBL之下(如第6圖所示)。在步驟410和步驟412中，當觸控感測電路110根據第三控制訊號TCS，對觸控面板104的觸控區塊執行觸控偵測以產生一相對應的觸控原始資料時，觸控感測電路110可根據觸控面板104的觸控區塊的觸控原始資料和目前面板雜訊基準值PNBL，產生對應觸控面板104的觸控區塊的觸控資料。In step 404, the liquid crystal panel driving circuit 108 displays an image in each of the plurality of blocks 1061-106N of the liquid crystal panel 106 sequentially driven from top to bottom according to the first control signal FCS in the picture time FP. The picture time FP is between the two consecutive vertical sync signals VSYNC1 and VSYNC2 of the liquid crystal panel 106. Therefore, as shown in FIG. 5, the liquid crystal panel driving circuit 108 is driving the image 1067 to display an image according to the first control signal FCS. That is, the liquid crystal panel driving circuit 108 has already driven the corresponding image by driving the blocks 1061-1066 according to the first control signal FCS. In step 406, the touch sensing circuit 110 sequentially captures the current panel noise reference value of each block of the touch panel 104 according to the second control signal SCS, wherein the touch sensing circuit 110 does not The second control signal SCS captures the current panel noise reference value of a block of the corresponding block 1067 in the touch panel 104. Therefore, when the block 1067 displays an image, the touch sensing circuit 110 can synchronously capture the current panel noise reference value of a touch block of the non-corresponding block 1067 of the touch panel 104 according to the second control signal SCS. The PNBL (as shown in FIG. 6), wherein the touch block of the touch panel 104 is a block in the corresponding block 1061-1066 or a block in the corresponding block 1068-106N. Because the touch sensing circuit 110 is synchronously capturing the touch panel according to the second control signal SCS The current panel noise reference value PNBL of the touch block of the non-corresponding block 1067 is the display rate of the plurality of blocks 1061-106N of the liquid crystal panel 106 and the touch sensing circuit 110 captures the touch panel 104. The current panel noise reference values of the plurality of touch blocks are the same. In addition, if the touch sensing circuit 110 displays the image in the block 1067, according to the second control signal SCS, the current panel noise reference value PNBL of the touch block of the touch panel 104 is prepared, and according to the third control. The touch sensing circuit 110 first performs touch detection on the touch block of the touch panel 104 according to the third control signal TCS when the touch detection is performed on the touch panel of the touch panel 104. Then, according to the second control signal SCS, the current panel noise reference value PNBL of the touch block of the touch panel 104 is captured. In step 408, the touch sensing circuit 110 updates the front panel of the touch panel 104 in the previous screen time according to the current panel noise reference value PNBL of the touch panel of the touch panel 104. The reference value PPNBL of the touch panel 104, wherein the front panel noise reference value PPNBL of the touch panel 104 in the previous screen time is stored in a temporary storage area 112 in the touch system 100, and the touch panel 104 is The current panel noise reference value PNBL of the touch block is located under the front panel noise reference value PPNBL of the touch block in the previous picture time (as shown in FIG. 6). In step 410 and step 412, when the touch sensing circuit 110 performs touch detection on the touch block of the touch panel 104 according to the third control signal TCS to generate a corresponding touch original data, The touch sensing circuit 110 generates touch data corresponding to the touch block of the touch panel 104 according to the touch original data of the touch panel of the touch panel 104 and the current panel noise reference value PNBL.
如第6圖所示，因為觸控感測電路110根據觸控區塊的目前面板雜訊基準值PNBL，更新觸控區塊在前一畫面時間中的前面板雜訊基準值PPNBL，所以大部分雜訊(位於目前面板雜訊基準值PNBL之上)都被觸控感測電路110忽略。因此，觸控感測電路110即可根據目前面板雜訊基準值PNBL和一臨界值THV判斷一觸控訊號TS不是雜訊。另外，當觸控面板104是一自感式電容觸控面板時，觸控面板104的觸控區塊的目前面板雜訊基準值PNBL是位於觸控區塊在前一畫面時間中的前面板雜訊基準值PPNBL之上。As shown in FIG. 6, the touch sensing circuit 110 updates the front panel noise reference value PPNBL of the touch block in the previous screen time according to the current panel noise reference value PNBL of the touch block. Part of the noise (above the current panel noise reference value PNBL) is ignored by the touch sensing circuit 110. Therefore, the touch sensing circuit 110 can determine that the touch signal TS is not noise according to the current panel noise reference value PNBL and a threshold THV. In addition, when the touch panel 104 is a self-inductive capacitive touch panel, the current panel noise reference value PNBL of the touch panel of the touch panel 104 is the front panel of the touch panel in the previous screen time. The noise reference value is above PPNBL.
請參照第7圖和第8圖，第7圖是本發明的另一實施例說明一種觸控系統的驅動方法的流程圖，和第8圖是說明液晶面板106的複數個區塊1061-106N的顯示時序與觸控感測電路110擷取觸控面板104的目前面板雜訊基準值的時序的示意圖。第7圖的驅動方法是利用第1圖的觸控系統100說明，詳細步驟如下：步驟700：開始；步驟702：時序控制器102產生一第一控制訊號FCS、一第二控制訊號SCS與一第三控制訊號TCS；步驟704：液晶面板驅動電路108在一畫面時間FP中根據第一控制訊號FCS，依序驅動液晶面板106的複數個區塊1061-106N中的每一區塊顯示一影像；步驟706：觸控感測電路110於畫面時間FP中的一垂直空白區間VB根據第二控制訊號SCS，擷取對應觸控面板104的目前面板雜訊基準值PNBL；步驟708：觸控感測電路110根據觸控面板104的目前面板雜訊基準值PNBL，更新觸控面板104在前一畫面時間中的前面板雜訊基準值PPNBL；步驟710：觸控感測電路110根據第三控制訊號TCS，對觸控面板104的觸控區塊執行一觸控偵測以產生一相對應的觸控原始資料；步驟712：觸控感測電路110根據觸控面板104的觸控區塊的觸控原始資料和觸控面板104的目前面板雜訊基準值PNBL，產生對應觸控面板104的觸控區塊的觸控資料，跳回步驟702。Please refer to FIG. 7 and FIG. 8. FIG. 7 is a flowchart illustrating a driving method of the touch system according to another embodiment of the present invention, and FIG. 8 is a diagram illustrating a plurality of blocks 1061-106N of the liquid crystal panel 106. The display timing and the timing of the touch sensing circuit 110 capturing the timing of the current panel noise reference value of the touch panel 104. The driving method of FIG. 7 is illustrated by the touch system 100 of FIG. 1. The detailed steps are as follows: Step 700: Start; Step 702: The timing controller 102 generates a first control signal FCS, a second control signal SCS and a The third control signal TCS; Step 704: The LCD panel driving circuit 108 sequentially drives an image of each of the plurality of blocks 1061-106N of the liquid crystal panel 106 according to the first control signal FCS in a picture time FP. Step 706: The touch sensing circuit 110 captures the current panel noise reference value PNBL corresponding to the touch panel 104 according to the second control signal SCS in a vertical blank interval VB in the screen time FP; Step 708: Touch sense The measuring circuit 110 updates the front panel noise reference value PPNBL of the touch panel 104 in the previous screen time according to the current panel noise reference value PNBL of the touch panel 104; Step 710: The touch sensing circuit 110 according to the third control The signal TCS performs a touch detection on the touch block of the touch panel 104 to generate a corresponding touch original data. Step 712: The touch sensing circuit 110 is configured according to the touch block of the touch panel 104. Touch original capital And the current reference noise value PNBL panel 104 of the touch panel generates the touch data block corresponding to the touch the touch panel 104, and jumps back to step 702.
如第8圖所示，第7圖的實施例和第4圖的實施例的差別在於在 步驟706中觸控感測電路110是於垂直空白區間VB根據第二控制訊號SCS，擷取對應觸控面板104的目前面板雜訊基準值PNBL，以及在步驟708中觸控感測電路110根據觸控面板104的目前面板雜訊基準值PNBL，更新觸控面板104在前一畫面時間中的前面板雜訊基準值PPNBL。因此，在第7圖的實施例中，目前面板雜訊基準值PNBL是對應整個觸控面板104，而非對應觸控面板104的一區塊。另外，第7圖的實施例的其餘操作原理皆和第4圖的實施例相同，在此不再贅述。As shown in Fig. 8, the difference between the embodiment of Fig. 7 and the embodiment of Fig. 4 is that In step 706, the touch sensing circuit 110 captures the current panel noise reference value PNBL corresponding to the touch panel 104 according to the second control signal SCS, and the touch sensing circuit 110 according to step 708 The current panel noise reference value PNBL of the touch panel 104 updates the front panel noise reference value PPNBL of the touch panel 104 in the previous screen time. Therefore, in the embodiment of FIG. 7 , the current panel noise reference value PNBL corresponds to the entire touch panel 104 rather than a block corresponding to the touch panel 104 . In addition, the remaining operating principles of the embodiment of FIG. 7 are the same as those of the embodiment of FIG. 4, and details are not described herein again.
綜上所述，本發明所提供的觸控系統的驅動方法是利用觸控感測電路擷取對應觸控面板中一觸控區塊的目前面板雜訊基準值，或利用觸控感測電路擷取對應整個觸控面板的目前面板雜訊基準值。當觸控感測電路擷取對應觸控面板中該觸控區塊的目前面板雜訊基準值時，觸控感測電路根據對應該觸控區塊的觸控原始資料和對應該觸控區塊的目前面板雜訊基準值，產生對應該觸控區塊的觸控資料；當觸控感測電路擷取對應整個觸控面板的目前面板雜訊基準值時，觸控感測電路根據對應該觸控區塊的觸控原始資料和對應整個觸控面板的目前面板雜訊基準值，產生對應該觸控區塊的觸控資料。相較於現有技術，因為本發明可動態更新對應該區塊的目前面板雜訊基準值和對應整個觸控面板的目前面板雜訊基準值，所以本發明可降低液晶面板的干擾以增加觸控感測電路所產生的觸控資料的準確性，亦不會限制觸控訊號的報點率。In summary, the driving method of the touch system provided by the present invention is to capture the current panel noise reference value of a touch block in the touch panel by using the touch sensing circuit, or use the touch sensing circuit. Capture the current panel noise reference value for the entire touch panel. When the touch sensing circuit captures the current panel noise reference value of the touch panel in the touch panel, the touch sensing circuit is based on the touch original data corresponding to the touch block and the corresponding touch area. The current panel noise reference value of the block generates touch data corresponding to the touch block; when the touch sensing circuit captures the current panel noise reference value corresponding to the entire touch panel, the touch sensing circuit is based on The touch raw data of the touch block and the current panel noise reference value of the entire touch panel should be generated to generate touch data corresponding to the touch block. Compared with the prior art, the present invention can dynamically update the current panel noise reference value of the corresponding block and the current panel noise reference value corresponding to the entire touch panel, so the invention can reduce the interference of the liquid crystal panel to increase the touch. The accuracy of the touch data generated by the sensing circuit does not limit the reporting rate of the touch signal.
以上所述僅為本發明之較佳實施例，凡依本發明申請專利範圍所做之均等變化與修飾，皆應屬本發明之涵蓋範圍。The above are only the preferred embodiments of the present invention, and all changes and modifications made to the scope of the present invention should be within the scope of the present invention.
400-412‧‧‧步驟400-412‧‧‧Steps
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| US9746961B2 (en) * | 2014-12-19 | 2017-08-29 | Apex Material Technology Corp. | Background signal processing system and background signal processing method |
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Also Published As
| Publication number | Publication date |
|---|---|
| TW201510830A (en) | 2015-03-16 |
| US20150062061A1 (en) | 2015-03-05 |
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